Combining multibeam-sonar and multifrequency-echosounder data: examples of the analysis and imaging of large euphausiid schools

R. J Korneliussen, Y Heggelund, I. K Eliassen, O. K Oye, T Knutsen and J. Dalen

ICES Journal of Marine Science 66 ( 6 ): 991 - 997 , 2009